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Bit-depth explained: Everything you need to know - SoundGuys
https://www.soundguys.com/audio-bit-depth-explained-23706/#:~:text=The%20equation%2020log%20%282n%29%2C%20where%20n%20is%20the,hits%2096dB%2C%20and%2024%20bits%20a%20whopping%20144dB.
Bit-depth explained: Everything you need to know - …
https://soundguys.com/audio-bit-depth-explained-23706/
An 8-bit signal has an SNR of 48dB, 12 bits is 72dB, while 16-bit hits 96dB, and 24 bits a whopping 144dB.
12-bit and 8-bit Audio Samplers | Project Lab
https://nootropicdesign.com/projectlab/2013/07/05/audio-sampler/
The first sketch you should use with the Audio Hacker is the 12-bit Sampler. Install the Audio Hacker Arduino library in your Arduino sketchbook, then choose the menu item File->Examples->Audio Hacker->Sampler_12bit. Connect …
12bit DAC enough for ATM quality audio messages? | AVR Freaks
https://www.avrfreaks.net/forum/12bit-dac-enough-atm-quality-audio-messages
Anyway the big question is: is 12bit high enough for such application? Landline telephone calls use 13-14 bit DACs, sampling at 8ksps. These samples are compressed to 8 bits per sample (using ADPCM). The sound quality is "adequate". With a higher sampling rate and no compression, you should get better quality.
12 bit & 16 bit - Noticeable quality difference? at DVinfo.net
https://www.dvinfo.net/forum/canon-xl1s-xl1-watchdog/50018-12-bit-16-bit-noticeable-quality-difference.html
The audio rates used are based on the DV specification and the bandwidth allocated on the tape for audio. 4 channels at 12-bit and 32 kHz equals the data rate of 2 channels at 16-bit and 48 kHz. The DV spec was probably finalized back in the early to mid 1990s, when the 80486 chip ruled and 200 megabytes was considered a huge hard drive.
Audio quality: Understanding bits, sample rate and formats
https://blog.hotmart.com/en/audio-quality/
It’s through the compression rate value (or bitrate) that we can control the file size and consequently, audio quality. For example, a 320 kbps MP3 (kilobits per second) can sound as good as an uncompressed CD or DVD audio.
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